diff --git a/src/Hyperion.Tests/Hyperion.Tests.csproj b/src/Hyperion.Tests/Hyperion.Tests.csproj
index 1e934f67..69718fb6 100644
--- a/src/Hyperion.Tests/Hyperion.Tests.csproj
+++ b/src/Hyperion.Tests/Hyperion.Tests.csproj
@@ -64,7 +64,7 @@
   <ItemGroup>
     <PackageReference Include="FluentAssertions" Version="$(FluentAssertionsVersion)" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
-    <PackageReference Include="System.Collections.Immutable" Version="5.0.0" />
+    <PackageReference Include="System.Collections.Immutable" Version="7.0.0" />
     <PackageReference Include="System.Security.Principal.Windows" Version="5.0.0" />
     <PackageReference Include="xunit" Version="$(XunitVersion)" />
     <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitRunnerVersion)" />
diff --git a/src/Hyperion/Hyperion.csproj b/src/Hyperion/Hyperion.csproj
index 02a4150d..8476c80e 100644
--- a/src/Hyperion/Hyperion.csproj
+++ b/src/Hyperion/Hyperion.csproj
@@ -33,7 +33,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Collections.Immutable" Version="5.0.0" />
+    <PackageReference Include="System.Collections.Immutable" Version="7.0.0" />
     <PackageReference Include="System.Runtime.Serialization.Primitives" Version="4.3.0" />
   </ItemGroup>